My washing machine broke down so I made this little item out of a pine board in a hurry earlier today. It is about 18 inches or 45.7 cm long and 5 3/8 inches or 13.6 cm wide. Measurements were not real critical and I could have made the ridges a little straighter. Scrub surface riffles are about 11 inches or 28 cm top to bottom. I used hand tools only except for the hole on handle. Used it for first time after rounding edges and sanding it smooth, no finish needed. It fits in a bucket very well and would be a very good camp item. I was quite shocked on well it cleaned some small cotton clothes using a Naptha soap bar. Anyone else use these things?